| Message ID | 1430803373-4948-5-git-send-email-viro@ZenIV.linux.org.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue 05-05-15 06:21:39, Al Viro wrote: > From: Al Viro <viro@zeniv.linux.org.uk> > > let "fast" symlinks store the pointer to the body into ->i_link and > use simple_follow_link for ->follow_link() > > Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Looks good. You can add: Reviewed-by: Jan Kara <jack@suse.cz> Honza > --- > fs/inode.c | 1 + > fs/libfs.c | 13 +++++++++++++ > include/linux/fs.h | 3 +++ > 3 files changed, 17 insertions(+) > > diff --git a/fs/inode.c b/fs/inode.c > index ea37cd1..952fb48 100644 > --- a/fs/inode.c > +++ b/fs/inode.c > @@ -152,6 +152,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode) > inode->i_pipe = NULL; > inode->i_bdev = NULL; > inode->i_cdev = NULL; > + inode->i_link = NULL; > inode->i_rdev = 0; > inode->dirtied_when = 0; > > diff --git a/fs/libfs.c b/fs/libfs.c > index cb1fb4b..72e4e01 100644 > --- a/fs/libfs.c > +++ b/fs/libfs.c > @@ -1093,3 +1093,16 @@ simple_nosetlease(struct file *filp, long arg, struct file_lock **flp, > return -EINVAL; > } > EXPORT_SYMBOL(simple_nosetlease); > + > +void *simple_follow_link(struct dentry *dentry, struct nameidata *nd) > +{ > + nd_set_link(nd, d_inode(dentry)->i_link); > + return NULL; > +} > +EXPORT_SYMBOL(simple_follow_link); > + > +const struct inode_operations simple_symlink_inode_operations = { > + .follow_link = simple_follow_link, > + .readlink = generic_readlink > +}; > +EXPORT_SYMBOL(simple_symlink_inode_operations); > diff --git a/include/linux/fs.h b/include/linux/fs.h > index 35ec87e..0ac758f 100644 > --- a/include/linux/fs.h > +++ b/include/linux/fs.h > @@ -656,6 +656,7 @@ struct inode { > struct pipe_inode_info *i_pipe; > struct block_device *i_bdev; > struct cdev *i_cdev; > + char *i_link; > }; > > __u32 i_generation; > @@ -2721,6 +2722,8 @@ void __inode_sub_bytes(struct inode *inode, loff_t bytes); > void inode_sub_bytes(struct inode *inode, loff_t bytes); > loff_t inode_get_bytes(struct inode *inode); > void inode_set_bytes(struct inode *inode, loff_t bytes); > +void *simple_follow_link(struct dentry *, struct nameidata *); > +extern const struct inode_operations simple_symlink_inode_operations; > > extern int iterate_dir(struct file *, struct dir_context *); > > -- > 2.1.4 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/inode.c b/fs/inode.c index ea37cd1..952fb48 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -152,6 +152,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode) inode->i_pipe = NULL; inode->i_bdev = NULL; inode->i_cdev = NULL; + inode->i_link = NULL; inode->i_rdev = 0; inode->dirtied_when = 0; diff --git a/fs/libfs.c b/fs/libfs.c index cb1fb4b..72e4e01 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -1093,3 +1093,16 @@ simple_nosetlease(struct file *filp, long arg, struct file_lock **flp, return -EINVAL; } EXPORT_SYMBOL(simple_nosetlease); + +void *simple_follow_link(struct dentry *dentry, struct nameidata *nd) +{ + nd_set_link(nd, d_inode(dentry)->i_link); + return NULL; +} +EXPORT_SYMBOL(simple_follow_link); + +const struct inode_operations simple_symlink_inode_operations = { + .follow_link = simple_follow_link, + .readlink = generic_readlink +}; +EXPORT_SYMBOL(simple_symlink_inode_operations); diff --git a/include/linux/fs.h b/include/linux/fs.h index 35ec87e..0ac758f 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -656,6 +656,7 @@ struct inode { struct pipe_inode_info *i_pipe; struct block_device *i_bdev; struct cdev *i_cdev; + char *i_link; }; __u32 i_generation; @@ -2721,6 +2722,8 @@ void __inode_sub_bytes(struct inode *inode, loff_t bytes); void inode_sub_bytes(struct inode *inode, loff_t bytes); loff_t inode_get_bytes(struct inode *inode); void inode_set_bytes(struct inode *inode, loff_t bytes); +void *simple_follow_link(struct dentry *, struct nameidata *); +extern const struct inode_operations simple_symlink_inode_operations; extern int iterate_dir(struct file *, struct dir_context *);